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6021752 DIAMXXXX CUT OUT rev 1-0.doc
II-18
II.4 SEB
II.4.1 DESCRIPTION
The lighting circuit cut-out plug is a safety device that will realise the separation and short circuit of the
constant current regulator main transformer and its load during maintenance operation.
Removing the handle will provide isolation of the load, eventually enable the CCR to operate in short
circuit.
An optional interlock contact may be provided, in order to shunt down the CCR while manoeuvering the
handles or monitor its position
II.4.2 SERVICE POSITION :
It is the operational position.
The handle is plugged in the cut out.
The CCR is connected to the loop.
II.4.3 SAFETY POSITION:
By removing the handle, the CCR is short circuited, the loop
is short circuited.
The loop is isolated from the CCR output.

WARNING : The loop is NOT CONNECTED TO EARTH.

WARNING : Although the CCR and the loop are short circuited, the CCR can be switched ON : In
that case, it regulates a constant current through the upper contact.